The Car Wash at Sugarloaf 4793 Sugarloaf Pkwy, Lawrenceville, GA30044 This car wash offers full-service washes and detailing, and features a comfortable lobby with free coffee and Wi-Fi…More while you wait. There's even a coy fish pool outside the office. You get a free full-service wash when you purchase an oil change. This car was also offer a window tinting service. And you get a free rewash if it rains within four days of your original wash.